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vmh1928yesterday at 2:39 PM0 repliesview on HN

Modulating a laser beam for communications is not new but this distance effort by amateurs doing a two-way voice transmission over 167km in New Zeland is pretty cool. This article also mentions a number of other laser communication long distance efforts.

https://www.modulatedlight.org/Modulated_Light_DX/MODULATED_...